August weather in Rochester, IL
The average temperature in Rochester in August is °F (°F–°F). Average precipitation: 2.95 inches.
August is a summer month in Rochester, and is cooler than the annual average of 0°F. Daylight averages about 13h 34m.
Avg High
°F
Avg Low
°F
Precipitation
2.95 in
Daylight
13h 34m
August records in Rochester
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | — | — | 1.53 in (2024) |
| August 2 | — | — | 0.40 in (2014) |
| August 3 | — | — | 0.67 in (2022) |
| August 4 | — | — | 0.27 in (2007) |
| August 5 | — | — | 0.56 in (2009) |
| August 6 | — | — | 0.37 in (2015) |
| August 7 | — | — | 1.50 in (2023) |
| August 8 | — | — | 1.13 in (2006) |
| August 9 | — | — | 2.19 in (2021) |
| August 10 | — | — | 2.82 in (2023) |
| August 11 | — | — | 0.58 in (2017) |
| August 12 | — | — | 0.98 in (2023) |
| August 13 | — | — | 2.22 in (2016) |
| August 14 | — | — | 0.70 in (2010) |
| August 15 | — | — | 1.18 in (2024) |
| August 16 | — | — | 0.33 in (2024) |
| August 17 | — | — | 2.09 in (2018) |
| August 18 | — | — | 0.05 in (2023) |
| August 19 | — | — | 0.25 in (2007) |
| August 20 | — | — | 0.96 in (2009) |
| August 21 | — | — | 2.27 in (2014) |
| August 22 | — | — | 0.55 in (2008) |
| August 23 | — | — | 0.08 in (2013) |
| August 24 | — | — | 0.43 in (2018) |
| August 25 | — | — | 0.39 in (2018) |
| August 26 | — | — | 0.83 in (2021) |
| August 27 | — | — | 0.19 in (2012) |
| August 28 | — | — | 0.26 in (2014) |
| August 29 | — | — | 2.27 in (2014) |
| August 30 | — | — | 0.00 in (2003) |
| August 31 | — | — | 0.98 in (2024) |